Sole structure for shoes and shoe with the sole structure

Abstract

A support of a sole structure includes a base disposed in a middle region in a foot width direction and having an upper surface which follows a plantar surface of a wearer's foot, and upper and lower supports continuous with a side portion of the base on a medial side in the foot width direction. The upper support has an upper surface that is continuous with the side portion of the base such that the upper surface of the upper support, together with the upper surface of the base, follows the plantar surface. The lower support is continuous with the side portion of the base so as to be located under the upper support, and has a corrugated shape having peaks and valleys alternating with each other in a longitudinal direction along the side portion of the base.

What is claimed is: 
     
       1. A sole structure for shoes, the sole structure comprising:
 a sole body made of an elastic material; and 
 a support positioned in a middle portion, in a thickness direction, of the sole body and made of a thin layer harder than the sole body, wherein 
 the support includes
 a base disposed in a middle region in a foot width direction and having an upper surface configured to be along a plantar surface of a foot of a wearer wearing the shoe, and 
 an upper support and a lower support which are continuous with a side portion on at least one side, in the foot width direction, of the base, 
 
 the upper support has an upper surface that is continuous with the side portion of the base such that the upper surface of the upper support, together with the upper surface of the base, follows the plantar surface, 
 the lower support is continuous with the side portion of the base so as to be located under the upper support, and has a corrugated shape having peaks and valleys alternating with each other in a longitudinal direction along the side portion of the base, 
 the lower support includes
 a peak curve portion forming an upwardly projecting curve and having a peak integrally and continuously formed with the upper support, and 
 a valley curve portion forming a downwardly projecting curve continuous with anterior and posterior portions of the peak curve portion, and 
 
 the valley curve portion has, in a cross section along the foot width direction, one end portion in the foot width direction which is integrally formed with the side portion of the base, and the other end portion in the foot width direction which is branched from the side portion of the base in a downward direction with respect to the upper support. 
 
     
     
       2. The sole structure of  claim 1 , wherein the upper surface of the base is a plain surface. 
     
     
       3. The sole structure of  claim 1 , wherein
 a ribbed portion is provided between the lower surface of the upper support and the upper surface of the lower support. 
 
     
     
       4. The sole structure of  claim 1 , wherein
 the upper support has a side wall portion which rises from a side portion of the upper support and extends in the longitudinal direction. 
 
     
     
       5. The sole structure of  claim 1 , wherein
 the support is disposed at a region including a region corresponding to a heel portion of the wearer's foot. 
 
     
     
       6. The sole structure of  claim 1 , wherein
 the upper and lower supports are disposed on a medial side in the foot width direction. 
 
     
     
       7. The sole structure of  claim 1 , wherein
 the upper and lower supports are disposed on a lateral side in the foot width direction. 
 
     
     
       8. A shoe comprising a sole structure for shoes, the sole structure comprising:
 a sole body made of an elastic material; and 
 support positioned in a middle portion, in a thickness direction, of the sole body and made of a thin layer harder than the sole body, wherein 
 the support includes
 a base disposed in a middle region in a foot width direction and having an upper surface configured to be along a plantar surface of a foot of a wearer wearing the shoe, and 
 an upper support and a lower support which are continuous with a side portion on at least one side, in the foot width direction, of the base, 
 
 the upper support has an upper surface that is continuous with the side portion of the base such that the upper surface of the upper support, together with the upper surface of the base, follows the plantar surface, 
 the lower support is continuous with the side portion of the base so as to be located under the upper support, and has a corrugated shape having peaks and valleys alternating with each other in a longitudinal direction along the side portion of the base, 
 the lower support includes
 a peak curve portion forming an upwardly projecting curve and having a peak integrally and continuously formed with the upper support, and 
 a valley curve portion forming a downwardly projecting curve continuous with anterior and posterior portions of the peak curve portion, and 
 
 the valley curve portion has, in a cross section along the foot width direction, one end portion in the foot width direction which is integrally formed with the side portion of the base, and the other end portion in the foot width direction which is branched from the side portion of the base in a downward direction with respect to the upper support. 
 
     
     
       9. The shoe of  claim 8 , wherein the upper surface of the base is a plain surface. 
     
     
       10. The shoe of  claim 8 , wherein
 a ribbed portion is provided between the lower surface of the upper support and the upper surface of the lower support. 
 
     
     
       11. The shoe of  claim 8 , wherein
 the upper support has a side wall portion which rises from a side portion of the upper support and extends in the longitudinal direction. 
 
     
     
       12. The shoe of  claim 8 , wherein
 the support is disposed at a region including a region corresponding to a heel portion of the wearer's foot. 
 
     
     
       13. A shoe of  claim 8 , wherein
 the upper and lower supports are disposed on a medial side in the foot width direction. 
 
     
     
       14. The shoe of  claim 8 , wherein
 the upper and lower supports are disposed on a lateral side in the foot width direction.